BLOW PIPE STRUCTURE
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United States of America Patent
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Issued Date -
Sep 3, 2015
app pub date -
Sep 10, 2013
filing date -
Sep 20, 2012
priority date (Note) -
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Abstract
Provided is a blow-pipe structure for a blast furnace facility configured so as to be capable of suppressing slag adhesion by using a simple structure, even if pulverized coal with an unadjusted softening temperature is used. The blow-pipe structure is attached to a tuyere for a blast furnace main body that produces pig iron from iron ore, said blow-pipe structure injecting auxiliary fuel pulverized coal together with hot air, and slag from the pulverized coal containing a component that is melted by the hot air and/or heat from combustion of the pulverized coal. A resisting element that increases flowpath resistance on the pipe inside wall surface side and concentrates the flows of the hot air and the pulverized coal to the flowpath axis center is provided on the downstream side of an injection lance that inserts pulverized coal into the blow pipe.
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